Automatic pressure-regulator and stop-valve



(No Model.)

I. N. GASK-ILL.

AUTOMATIC PRESSURE REGULATOR AND STOP VALVE. I No. 530,765. Patented Dec. 11, 1894.

UNITED STATES j ATENT Price. 7

ISAAC N. GASKILL, OF ST. LOUIS, MISSOURI.

SPECIFICATION forming part of Letters Patent No. 530,765, dated December 11, 1894, Application filed March 29, 1894. Serial No. 505,535 (No model.)

To aZZ whom it may concern:

Be it known thatI, ISAAC N. GAsK1LL,of

. the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Automatic Pressure-Regulators and Stop-Valves, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to an improvedautomatic pressure regulator and stop valve, and consists in the novel construction, combination and arrangement of parts, hereinafter specified and designated in the claims.

The object of my invention is to provide an improved device. of this class, w hich shall automaticallyv regulate the passage of steam, or fluid, through thepipe to which it is connected, and which shall automatically act to cut off the flow of steam through said pipe in the event of an accidental destructiomor explosion, of the'pipe, or any of the parts to which it is connected.

Referring to the drawings: Figure 1 is a side elevation, showing the device as applied for practical use. Fig.2 is a central longitudinal sectional elevation of the device detached. Fig. 3 is a transverse sectional elevation on the line 3-3 of Fig. 2. Fig. 4 is a transverse sectional elevation on the line 44 of Fig. 1. Fig. 5 is a perspective view of the valve-plug.

In the construction of thedevice as shown, the numeral designates a common steam boiler, and 11 an ordinary rendering tank such as is made use of in lard rendering establishments, packing houses, and the like. Extending from the boiler is a steam pipe 12 having a globe, or other common valve, 13 connected thereto for closing said pipe by hand, when necessary. Another steam pipe 14 communicates with the rendering tank 11. Interposed between, and connecting, the steam pipes12, 14 is a casing 15 having a cylinder 16 integrally formed therewith, and extending vertically therefrom. Transversely mounted in the casing 15 is a valve-plug 17 (Fig. 5) adapted for reciprocatory rotation. Said valve-plug is approximately semi-cylindrical in form, and is provided with two slots 18, 18 arranged parallel but extending longitudinally of said valve-plug one in a plane above the other. Located at the approximate axis of the valve-plug 17, and extending longitudinally through the same, is a bore 19, which is oval, orelongated, in cross-section andadapted to admit and retain a rock-shaft 20 therein,

which rock-shaft is also oval in cross section being pivotally connected to the lower end of a connecting rod 22, the upper end of which connecting rod is pivotally connected to the horizontal lever 23 at a point about mid-way of the length of the latter, which is f ulcrumed at one end on a standard 24 that is vertically mounted upon the cylinder 16. Adjustably positioned on the outer portion of the lever 23 is a weight 25. r Y

The lower end of the cylinder 16 communicates with the interior of. the casing 15, while theupper end ofsaid cylinder is closed and provided with a guide, orbearing, 26,.within which is mounted a piston-rod 27 provided with a link connection 28 between its upper end and the said lever 23 at a point intermediate of the connecting rod 22 and the standard 24. The lower portion of the piston 27 A extends within the cylinder 16, and has secured thereto a piston29 of any suitable construction.

A standard 30 is fixed to the cylinder 16 and extends vertically therefrom to a point adjacent the lever 23, and a pin 31 is connected to the said standard'and is adapted to be positioned in a transvere aperture therein, and sustainthe weighted lever, at times.

- That portion of the casing 15 in which the valve-plug is mounted conforms upon its interior to the shape of the valve-plug, so that during rocking movement of the latter, a steam tight joint will be formed between said parts, and the slots in said valve-plug are positioned substantially in alignment with the interiorof the horizontal portions of the pipes 12,14, so that the steam passing through said pipes may pass in a substantially straight line through said casing, and through the slots in said valve-plug from one pipe to the other.

A very important portion of my invention is the construction and relative positioning of the valve-plug 17 and the piston 29, whereby when said piston is moved abnormally inward, said valve-plug will be abnormally moved a corresponding amount and the flow of steam will thereby be cut off by it.

The operation is as follows: Steam emanating from the boiler 10 is conveyed through the pipe 12 and globe-valve 13 to the casing 15; and the lever 23, and parts connected thereto, being supported in normal position by the pin 31 of the standard 30, the valve-plug 17 is so positioned that the slots thereof are in alignment with the pipe 12 and register with opposite slots formed in a transverse partition extending across the interior of said casing, and the steam passes through said slots into the rear portion of said casing beneath said piston, and into the pipe 14 and tank 11. Upon the entrance of steam into said tank, pressure therein and in the pipe 14 and casing 15 accumulates, and is exerted beneath the piston 29, until it raises the latter and also raises the lever 23 off of the pin 31. Prior to this, however, the weight 25 should be so positioned upon the lever 23 in accordance with the pressure desired in the tank 11. If a great pressure be desired therein, said weight should be placed adjacent the outer free end of said lever, while if a lesser pressure he desired the weight should be correspondingly moved inward and fixed in position in any common manner. As soon as the desired pressure in the tank has been reached and the lever 23 thereby raised from the pin 81, said pin 31 should be removed so that said lever will be at liberty to fall below its normal position.

It is apparent that in the event of an acoidental explosion, or destruction, of the tank 11, pipe 14, or any adjacent portion of the casing 15, the pressurein these parts will im mediately be removed from beneath the piston 29, and said piston will instantaneously gravitate downward below its normal elevation, and the connections between it and the valve-plug 17 will cause the latter to move in a direction the reverse of that above described, and all passage of steam from the boiler will thereby be automatically cut off from the broken part, or parts, and all damage, or injurious effects of continued escape of steam from the boiler be elfectually prevented.

What I claim is--.

1. An automatic pressure regulator and cut-off, comprising a steam conductor, a casing communicating therewith, a valve-plug mounted for oscillation within said casing, a weighted lever, a cylinder communicating with said casing, a piston mounted within said cylinder, a standard on said cylinder, a pin 81 removably mounted in an aperturein said standard beneath said lever, connections between said piston and the weighted lever, and connections between said lever and the valve-plug, whereby upon the variation of the steam pressure in said casing, the horizontal plane of the piston will co-incidently vary and automatically oscillate the valve-plug, whereby the flow of steam through said valve plug is regulated and controlled.

2. In adevice of the class described, a valve plug semi-cylindrical in form and having slots therein, and an axial bore oval in crosssection, in combination with a shaft oval in cross-section and inserted in said bore, and lever mechanism connected with said shaft, whereby the same is actuated to oscillate the said plug.

In testimony whereof I affix my signature in presence of two witnesses.

ISAAC N. GASKILL.

Witnesses:

M. G. IRION, Jam. 0. HIGDON. 

